A man comes in to a bike shop with a wobbly wheel, asking if it can be repaired. The bike mechanic looks at the wheel a moment, and then tightens one spoke. The wheel is straight again. "That'll be forty dollars, sir," says the mechanic. Aghast, the customer replies, "Forty dollars? You turned one spoke!" The mechanic replies, "It's $1 for the labor, and $39 for knowing which spoke to turn."
Our friend and client Joe Reichert at Amlings Cycle told me this anecdote about pricing: